Pulsator for milking machines



A. BEHNKE ET. Al.

PULSATOR FOR MILKING lMACHINES Filed July 22. 1922 2 Sheets-Sheet x @Haz ump.

Jan. a ,41924;

A. QEHNKE E 'r AL PULSATOR FOR MILKING MACHINES Filed July 22. 1922A 2 Sheets-Sheet 2 ff Jg' z 57 /ffl ./4 Z hf 4 y; JXV? u i 61H01 n uf Patented Jan. 8, 1924.

ARTHUR BEHNKE AND JENs c. Janson, or sentaron, Wisconsin.

'PULsA'roR Fon MILKrNG MACHINES.

Application med July 22, i922. serial No. 576,740.

To all whom z't may conce-rn:

Be it "known that we, ARTHUR BEHNKE and JENS C. JnNsoN, citizens ofthe United States,`residing at Royalton, in the county of Waupaca and State ,of l/Visconsin, have invented a new and useful Pulsator for Milking Machines, of which the following is a specication.

This invention relates to milking machines and more particularly to pulsators for useV in connection therewith.

The object vof the invention'is to provide simple and eflicient means for distributing the unthrottled vacuum to the operating pis?` ton. e Another object is to provide a pulsator employing single pistons, the vacuum to one of which is direct, unthrottled vacuum being used on the Vpiston which alternates the valve for-vacuum on another piston lVith the foregoing and other objects in view which -will appearasthel description proceeds, the invention resides in thencombination and arrangement of parts and in the details of construction 'hereinafter described and claimed, it ybeing understood that changes in the precise embodiment of the inventionherein dislosed may be made within the scope of what is claimedv without departing from the spirit of the invention.

In the accompanying drawings r- I u Figure 1 represents a side elevation of a portion of va milk pail with this improved pulsator mounted on the lid thereof, parts being broken out and in sectionk l( Fig. 2 is an venlarged longitudinal section.

Fig. 3 is a transverse section taken on the line 3 3 of Fig. 2- Y u v Fig. 4, is a detail sectional view taken on the line jl-4 of Fig. 3. f

Fig vis ahorizontal section taken on the line 5 5 of Fig. 3.

Fig. 6 isa detail vertical section.

Fig. 7 is a detail sectional view, and

FigkSis adetail plan view. l I

In the embodiment illustrated, a milk pail lid or cover L is shown on which the pulsator constituting this invention is mounted and whichis designed ,to have an air tight connection with the pail so that a vacuum may be established in the pail to draw the milk thereinto.

A housing lY is mounted on the lid L andhas a cylinder l in which a largeppiston 2 is mounted to reciprocate, the heads y3 and Llthereof being connected by a Arod 5 from which "a stem' 6 :extends upwardly at right angles through an elongatedop'ening 7 iin the housing. The 'fheads .3 'and il are equipped -with packing 3% and 4a to provvide a fluid tightconnection between'the `piston n andthe cylinder walls. e

The housing l which is preferably 'made in the form of jacasting, has' two longitudinally alined boresf8 and 9V arranged yin-the top thereof parallel *with` the cylinder-in whichthe piston 2 operates. These bores 8 and 9 are separated by a transverse partition'l() adjacent which are two openings v1:1-

and v12 which lead from the bores f8 Sand Vl9 tothe atmosphere. u

hollow sliding valvel 'is mountedrrto reciprocate over "said openings" ll and l2 to connect them at intervals and to 'alternately OPs/11mg 15,0956@ the proper pulsating 'action in a manner Vpresently -to be' describe@ Y u A .framelftsurrounds the valveflB {an'd has alateral vex'tensionfl from onesi'deedge ne'arfone end ,off the rframe ljt'o' which the upper end of the stem 6 issecur'ed, see Figs. 3 yand 8. This valve 13 also, has a lateral extension 15a on'the edge opposite thatrron which the extension l5 is mountedandwhich is designed 'fora purpose "presently to bedescribed.

j uncover opening l2 'so that atmospheric air n maybe admittedto the bore 9 throughfsaid .The valve l13 is made lhollow as, 'shown i Fig, '2 so that whenin the position shown municat'e with each "other V'throughsaid valve which straddles partition 1'0 whenso located,

-1 18M connects nipple vl6w`with the pail.

Cheekyaive i9 in pipe is operates tomaiat'ain thef'vacuum Zinthe pail'.`

forked `nipple 2Qis inserted in`bo1'e'"`9 and is designed for connection withl ah'ose 21 .leadingto'fa' "clawf2rp '.l`h'is nipple 2Q is onlyforked when the'pul'satoris 1to.be .used

the vacuum throughbores and9 to the teat;

los Y for milking two cows simultaneously. When one cow only is t0 be Vmilked,` a or.V

topper22isginsertedin one branch of the he ciaive has a' ehamberfae with which? nipple, see. .Fig- 1- f hose 27 leads to a the hose 21 is connected from which a short chamber 29 formed between the teat cup shell 28 and a teat gripping vmember 30. One of these teat shells only is shown, but oi course it is to be understood that four are used in connection with each claw.

A valve 31 in the lid L is connected by a hose 32 with va chamber 33 or" claw 25 and through a hose 34 leading` trom said chamber 33 to the interior of the teat cup 30 applies a vacuum or suction to the teat and also operates as a conduit for conducting the milk drawn. from the teat to the pail.

The lid L has a bail-shaped handle 35 provided with a hook 36 on which to hang clawk 25 and the teat cups when not in use.

The casting 1 also has a bore 37 in which a small piston 38 reciprocates and which actuates a slide valve 39. This valve 39 alternates the vacuum and atmospheric pressure to operate piston 2 in a manner to be described.

Conduits 42 and 43 open into the opposite ends of the bore 37 and to the atmosphere and are controlled by the extension 15u01: the valve 13, said extension operating Vto alternately cover and uncover the respective conduits which open through the casting adjacent the openings 11 and 12 and which are controlled-'by the reciprocation of saidV valve 13.r

The extension 153,015 valve 13 is hollow and communicates withthe interior of valve 13Y and through conduits 42 and 43 connects opening 11 and the vacuum supply bore 8 with the cylinder or bore 37 alternately supplying vacuum to the ends of said cylinder to reciprocate piston 38 through valve 39 which piston actuates and controls piston 2.

Ports40 and 41 lead from a chamber 46 which is open to the atmosphere andinV which valve 39 reciprocates, to the respective ends of thecylinder 1a as is shown clearly in i Fig. 5. These ports are alternately covered 'and uncovered by valve 39 which also overlies the discharge end of a conduit 45 leading from bore 8 and by means of which vacuum is alternately supplied. from conduit 45 to the respective ends of cylinder 1a.

1 A regulating screw or throttle valve 44 operates in conduit 45 which leads from bore 8 to a point under valve 39 between the terminalsot ports 40 and 41 and said screw regulates the vacuum supplied to piston 2 and controls the speed of said piston 2 which produces the pulsations in the teat cups without affecting the movement of valve 39 so that ample power `for operating said valve isr afforded without the use oi any springs or snap-oils.

.In the use of this apparatus. the nipple 16 being connected with the stall cock of `the vacuumpipe line kor other vvacuuin producing means, and the nipple 20 with the hose 21 lea-ding to the teat cups, the pulsator is 1 operated as follows The slide valve 13 being; at the limit of its rearward stroke or its stroke towards the right, as shown in Figs. 2 and '8, suction is established in the teatshell 28 through bore 8, openings 11 and 121 bore 9, tube 21, and pipe 27 and the hollow branch or extension 15a' of valve 13 will overlie the terminal of conduit 43 and thus vacuum in the lett end ot bore 37 will be produced while the other end of said bore will be open to the atmosphere through conduit 43, the outer vend of which is uncovered when valve 13 is in this position.t The vacuum so produced in said bore 37 and the atmospheric pressure in the right end of said bore will operate to move piston 38 and the valve 39 controlled thereby to theleft and thus bring conduit 40 into communication. with conduit 45 and admit vacuum to the left end oi cylinder 1a. This connection oi' conduit 40 with conduit 45 will uncover the outer end of conduit 41 thereby admitting atmospheric pressure to the right end of cylinder la. This admission of vacuum and atmospheric pressure to `the cylinder 1a will operate to reciprocate piston 2 to the left and thereby through its connection with valve 13 shift said valve to the left which uncovers bore 9 bringingr it into communication with the atmosphere f and breakin@ the vacuum in the teat .cups and'simultaneously through the branch 15a supplies vacuum through conduit 42 to the right end of bore 37 and reciprocates valve 39 to the right bringing port 41 into coinmunication with bore 8 Jfor admitting` vacuum to the right end of cylinderla to reciprocate the piston 2 toward the right.y

It will thus be seen that when the vacuum is turned on into bore 8, the piston 2 will beL reciprocated to control the pulsations of the teat cups and also the actuation of valve 39 controls the supply of vacuum for actuating pistony 2 without in any Way interfering with the operation of valve 13.

By adjusting the set screw 44 the amounty of vacuum supplied-'to the cylinder 1a may be regulated and consequently the Speed of the pulsator controlled without in any way: affecting the vacuum supplied for operating piston .38 which controls valve 39 so that ample power forckoperating the valvei39 will be afforded and no springs or other mechanical co-ntrivances required toeffect such 0peration.

We claim 1. A pulsator includingr single, independent, pistons, means for supplying vacuum direct t0 one osaid pistons7 a reciprocatory valve controlling the vacuum supply to the other piston, means for regulatin'gj the vacuum supplied to said second mentioned `pistonhfor controlling thel speed of said piston, the direct vacuum Op- 2. In a pulsator, a casing having a pair ot.

cylinders, pistons mounted vto reciprocate in said cylinders, a conduit tor connection with vacuum mechanism, another conduit for if' connection with a teat cup mechanism, saidA conduits having ports leading therefrom, a hollow valve slidable'over said ports for intermittently connecting them and alternately exposing one of them to permit atmospheric pressure to enter saidport, a connection between said valve and the piston on one of said cylinders, a hollow extension leading from said valve and communicating therewith, conduits leading to the other cylinder and opening thereinto at opposite ends thereof, said valve extension being mounted to alternately connect said conduit with a vacuum supply and with the atmosphere, conduits located between said pistons, and means whereby the vacuum actuating valve connected piston is controlled by the other piston.

3. A pulsator comprising a casting having a cylinder bored therein and closed at its opposite ends, a piston reciprocable therein with a stein extending radially therefrom through the casting, longitudinallyv alined bores in the casting parallel with said cylinder and having laterally extending openings leading therefrom at their inner ends. a vacuum pipe connected with the outer end of one bore and a nipple in the outer end of the other bore' for connection with the claw hose, a hollow valve slidable oversaid'bore opening to alternately bring them into and out of communication7 said valve having ahollow lateral extension, said valve being` connected with said stein, whereby the yalve is operated by said piston, another cylinder having a piston reciprocable therein, conduits leading from the ends of said cylinder to a point under the valve and adapted to be alternately uncovered by saidl valve extension.A l Y A 4. In a pulsator, a casing having a pair of parallel cylinders with pistons mounted to reciprocate in said cylinders, a stem projecting from one of Said cylinders through said casing, a conduit for connection with vacuum mechanism, another conduit for connection with a teat cup mechanism, said conduits having ports leading therefrom, a hollow valve slidable over said ports for intermittently connecting them and alternately exposing one of them to' permit atmospheric pressure to entersaid port, said valve being attached to said piston stem, a hollow eX- tension leading from said valve and communicating therewith, conduits leading Vto the other cylinder and opening thereinto at opposite ends-thereof, saidv valve extension being mounted to alternately connect said con-' duit with a vacuum supply and with the atmosphere, conduits located between said pis-v tons, and means whereby the vacuum actuating stern carrying piston is controlled by the other piston;

In testimony that 'we claim the foregoing Y as our own,.we have hereto ailixed our sig- I natures in the'presence of two witnesses.

' ARTHUR BEHNKE;

v JENSI C. JENSYON.- Witnesses:` i Y Y C. F. BEEN-KE,

C. W.VPLowMAN. 

